41295-64-1
4-chloro-3-oxobutanoyl chloride
→
~89%
65840-68-8
4-氯-3-乙氧基-2-丁烯酸乙酯
66974-34-3
3,4-dichloro-crotonic acid ethyl ester
+
141-52-6
乙醇钠